package com.example.filter;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet Filter implementation class CharSetFilter
 */
@WebFilter("/*")
public class MyFilter implements Filter {

    /**
     * Default constructor. 
     */
    public MyFilter() {
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		// TODO Auto-generated method stub
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		// TODO Auto-generated method stub
		// place your code here

		// pass the request along the filter chain
		HttpServletRequest req=(HttpServletRequest)request;
		HttpServletResponse rep=(HttpServletResponse)response;
		req.setCharacterEncoding("utf-8");//对请求信息进行编�?
		rep.setCharacterEncoding("utf-8");//对响应信息进行编码，同时修改html编码
		rep.setContentType("text/html;charset=utf-8");
		((HttpServletResponse)response).addHeader("Access-Control-Allow-Origin","*");//以下三行解决跨域问题�?47-49�?
		((HttpServletResponse)response).addHeader("Access-Control-Allow-Headers",
				"Origin, X-Requested-With, Content-Type, Accept");
		//System.out.println("...........");
		chain.doFilter(request, response);
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		// TODO Auto-generated method stub
	}

}
